Transcription of Antenna Height and Communications Effectiveness
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Antenna Height and Communications Effectiveness
Antenna HeightandCommunications EffectivenessSecond EditionA Guide for City Planners and Amateur radio OperatorsBy R. Dean Straw, N6BV, and Gerald L. Hall, K1 TDSenior Assistant Technical Editor and Retired Associate Technical EditorCopyright 1999 The American radio Relay League, Main StreetNewington, CT 06111 Page 1 Executive SummaryAmateur radio operators, or hams as they are called, communicate with stations located allover the world. Some contacts may be local in nature, while others may be literally halfwayaround the world. Hams use a variety of internationally allocated frequencies to accomplish for local contacts, which are primarily made on Very High and Ultra HighFrequencies (VHF and UHF), communicating between any two points on the earth rely primarilyon high-frequency (HF) signals propagating through the ionosphere.
causes the surface to “fall away” from the path of the radio wave with greater distances. Therefore, it is the ionosphere that permits HF radio communications to be made between points separated by hundreds or even thousands of miles. The range of …
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